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Quarterly Data (Unaudited) | 12 Months Ended
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Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract] |
Supplementary financial information-quarterly data (Unaudited) | Supplementary Financial Information Quarterly Data (Unaudited) The following unaudited information shows selected items by quarter for the years 2013 and 2012:
| First Quarter |  | Second Quarter |  | Third Quarter |  | Fourth Quarter |
| (In thousands, except per share amounts)
2013 |  |  |  |
Operating revenues | $ | 931,604 |  | $ | 1,060,595 |  | $ | 1,285,782 |  | $ | 1,184,423 |
Operating expenses | 827,073 |  | 969,217 |  | 1,135,909 |  | 1,037,306 |
Operating income | 104,531 |  | 91,378 |  | 149,873 |  | 147,117 |
Income from continuing operations | 56,592 |  | 46,392 |  | 84,550 |  | 91,348 |
Loss from discontinued operations, net of tax | (77 | ) | (59 | ) | (118 | ) | (58 | )
Net income attributable to the Company | 56,515 |  | 46,512 |  | 84,456 |  | 91,450 |
Earnings per common share - basic: |  |  |  |  |  |  |
Earnings before discontinued operations | .30 |  | .25 |  | .45 |  | .48 |
Discontinued operations, net of tax | — |  | — |  | — |  | — |
Earnings per common share - basic | .30 |  | .25 |  | .45 |  | .48 |
Earnings per common share - diluted: |  |  |  |  |  |  |
Earnings before discontinued operations | .30 |  | .24 |  | .44 |  | .48 |
Discontinued operations, net of tax | — |  | — |  | — |  | — |
Earnings per common share - diluted | .30 |  | .24 |  | .44 |  | .48 |
Weighted average common shares outstanding: |  |  |  |  |  |  |
Basic | 188,831 |  | 188,831 |  | 188,831 |  | 188,929 |
Diluted | 189,222 |  | 189,463 |  | 189,638 |  | 189,766 |
2012 |  |  |  |  |  |  |  |
Operating revenues | $ | 852,807 |  | $ | 967,962 |  | $ | 1,173,518 |  | $ | 1,081,144 |
Operating expenses | 781,750 |  | 876,248 |  | 1,207,553 |  | 1,190,673 |
Operating income (loss) | 71,057 |  | 91,714 |  | (34,035 | ) | (109,529 | )
Income (loss) from continuing operations | 35,890 |  | 49,007 |  | (29,532 | ) | (69,686 | )
Income (loss) from discontinued operations, net of tax | (100 | ) | 5,106 |  | (139 | ) | 8,700 |
Net income (loss) attributable to the Company | 35,790 |  | 54,113 |  | (29,671 | ) | (60,986 | )
Earnings per common share - basic: |  |  |  |  |  |  |  |
Earnings (loss) before discontinued operations | .19 |  | .26 |  | (.16 | ) | (.37 | )
Discontinued operations, net of tax | — |  | .03 |  | — |  | .05 |
Earnings (loss) per common share - basic | .19 |  | .29 |  | (.16 | ) | (.32 | )
Earnings (loss) per common share - diluted: |  |  |  |  |  |  |  |
Earnings (loss) before discontinued operations | .19 |  | .26 |  | (.16 | ) | (.37 | )
Discontinued operations, net of tax | — |  | .03 |  | — |  | .05 |
Earnings (loss) per common share - diluted | .19 |  | .29 |  | (.16 | ) | (.32 | )
Weighted average common shares outstanding: |  |  |  |  |  |  |  |
Basic | 188,811 |  | 188,831 |  | 188,831 |  | 188,831 |
Diluted | 189,182 |  | 189,107 |  | 188,831 |  | 188,831 |
Notes:
• | First quarter 2013 reflects an unrealized loss on commodity derivatives of $3.7 million (after tax). First quarter 2012 reflects an unrealized loss on commodity derivatives of $2.6 million (after tax).
• | Second quarter 2013 reflects an impairment of coalbed natural gas gathering assets of $9.0 million (after tax) and an unrealized gain on commodity derivatives of $8.2 million (after tax). Second quarter 2012 reflects a net benefit of $15.0 million (after tax) related to natural gas gathering operations litigation, a net benefit largely related to estimated insurance recoveries related to the guarantee of a construction contract (reflected in income (loss) from discontinued operations), an unrealized gain on commodity derivatives of $3.0 million (after tax) and an impairment of coalbed natural gas gathering assets of $1.7 million (after tax). For more information, see Notes 1 and 19.
• | Third quarter 2013 reflects an unrealized loss on commodity derivatives of $7.9 million (after tax). Third quarter 2012 reflects a $100.9 million (after tax) noncash write-down of oil and natural gas properties and an unrealized loss on commodity derivatives of $700,000 (after tax). For more information, see Note 1.
• | Fourth quarter 2013 reflects a net benefit of $1.5 million (after tax) related to natural gas gathering operations litigation and an unrealized loss on commodity derivatives of $500,000 (after tax). Fourth quarter 2012 reflects a $145.9 million (after tax) noncash write-down of oil and natural gas properties, the reversal of an arbitration charge of $13.0 million (after tax) related to a guarantee of a construction contract, which was partially offset by the reversal of estimated insurance recoveries (reflected in income (loss) from discontinued operations), as well as an unrealized loss on commodity derivatives of $200,000 (after tax). For more information, see Notes 1 and 19.
Certain Company operations are highly seasonal and revenues from and certain expenses for such operations may fluctuate significantly among quarterly periods. Accordingly, quarterly financial information may not be indicative of results for a full year.

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- Definition The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e765-108305 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6372559&loc=d3e725-108305 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=25249566&loc=d3e1280-108306 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section G -Subsection 1 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 302 -Paragraph a + Details
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